Central fuel valve for internalcombustion engines



Aug. 10, 1954 G. PIELSTICK- 2,685,870

CENTRAL FUEL VALVE FOR INTERNAL-COMBUSTION ENGINES Filed Dec. 30, 1950 INVENTOR -GrUST AV PIE LSTKLK BY W-M ATTORNEYS Patented Aug. 10, 1954 CENTRAL FUEL VALVE FOR INTERNAL- COMBUSTION ENGINES Gustav Pielstick, Saint Germain en Laye, France Application December 30, 1950, Serial No. 203,581

Claims priority, application France May 15, 1950 1 Claim. 1

This invention relates to an improved central fuel valve arrangement for internal combustion engines, and more particularly to such a valve for a Diesel motor including fuel injection centrally of the cylinder head. In motors of such type, the valve-operating mechanism is usually enclosed in a sealed casing. In case of a, leakage in the valve, the fuel is able to penetrate into the lubricating oilcircuit, and may even cause explosions in the casing.

Another drawback of fuel valves of this kind is that the valves and their pipe connections are diflicult of access for repair and maintenance, especially in the case of four-valve cylinder-heads.

It is an object of this invention to provide a central fuel valve of the class specified in which all danger of the fuel contacting the lubricating oil in case of a leak is eliminated, and in which the various component parts are easy of access and easy to dismantle, repair and maintain.

The invention accordingly provides a generally cylindrical upstanding casing containing the V valve-operating rocker mechanism therein, and a tubular member extending axially of said casing in sealed relationship therewith, said tubular member being sealingly secured to, and projecting upwardly beyond, the casing cover and having the fuel-intake pipes connected to its projecting top above the casing, and supporting the valve member at its lower end.

The accompanying diagrammatic drawing 11- lustrates in axial cross-section one exemplary form of embodiment of a fuel valve assembly according to the invention.

In the drawing, the sealed generally cylindrical casing 2 contains the usual valve-operating rocker mechanism I and is sealed by a top cover 3. A tubular member 4 extends coaxially through the casing, being connected in sealed relationship with the casing at its bottom and with the cover 3 towards its top by respective threaded connections. The tubular member 4 projects upwardly beyond the casing cover as at 5 and is provided, at its upper end, with a head member supporting the intake fuel connections such as 6, 1. The tubular member 4 serves at its lower end to support the valve member proper 8. It will be seen'that in the operation of the motor, the fuel will flow from the intake connections 6, 1 down through the tubular member 4 to the valve 8 without any possibility of its being mixed with the oil in the casing. It is also seen that the various components are readily accessible.

What I claim is:

In a multivalve internal combustion engine a dismountable casing adapted to contain the valves of the engine with their related control mechanism, a tubular element having a substantially uniform diameter and solid walls traversing said casing from top to bottom in the central portion thereof and having a protruding top portion, means for securing said element on the top of said casing in an easily dismountable way, control means on the said protruding end for mounting and dismounting said element from outside said casing and for directly introducing it therein and extracting it therefrom, duct means on said protruding end permitting the introduction of fuel in said element and outlet valve means on the opposite end of said element conducting into the related engine cylinder.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,662,553 Wilking Mar. 13, 1928 1,981,412 Fritzsche Nov. 20, 1934 2,021,744 Perkins Nov. 19, 1935 2,221,405 Nallinger Nov. 12, 1940 FOREIGN PATENTS Number Country Date 456,595 Germany Feb. 27, 1928 694,124 Germany July 25, 1940 

